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Price Risk Management (Policies)	12 Months Ended
Price Risk Management (Policies)	Dec. 31, 2012
Price Risk Management [Abstract]
Gross Reporting of Positive and Negative Exposures Related to Derivative Instruments [Policy Text Block]	PGE has elected to report gross on the consolidated balance sheets the positive and negative exposures resulting from derivative instruments entered into with counterparties where a master netting arrangement exists.